Sample Submittal Form                      The Microbiological Testing Professionals                    800-282-7102
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COSMETICS AND PERSONAL CARE PRODUCTS


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For the manufacturer of cosmetic and personal care products, it is important  to ensure that their products are free of microorganisms and are safe for consumer use. This can only be achieved through use of a sound quality assurance and control program. Accugen  is a highly qualified  test laboratory for the cosmetic and personal care industries. Our staff of experienced  personnel  serve you to assure that your products are  free of objectionable microorganisms. Following are the most common tests:

  • Aerobic Plate Count (APC)
  • This test determines the  total number of aerobic bacteria in the product. It is 48 to 72 hour test.

  • Yeast and Mold Count

    This test determines the  total number of yeast and fungi  in the product. It is carried out till five days.

  • Antimicrobial Effectiveness Test (Challenge Test):
  • Antimicrobial preservatives are added in the products to protect them from microbial contamination. Antimicrobial efficacy test evaluates the effectiveness of an antimicrobial preservative.The microorganism survival is monitored till 28 days.  At least 100 –150 ml or grams of the  product  is needed to run this test.The test is carried out in such a way that the product is challenged with the known strains of the microorganisms. Samples are tested at different intervals to determine the survival of the organisms. The test demonstrate the efficacy of the product to stop the growth of organisms like Staphylococcus aureus , Escherichia coli, Pseudomonas aeruginosa ,  Candida albicans and Aspergillus niger.

  • Minimum Inhibitory Concentration (MIC)
  • This test determines the lowest concentration of  the product inhibiting visible growth of microorganisms.

Zone of Inhibition

Zone of inhibition is the area of no bacterial growth around the product in the disk-diffusion test. A series of  test agent impregnated paper disks are placed on a plate inoculated to form a bacterial lawn. The plates are incubated to allow growth of the bacteria . If an organism is susceptible to an agent, a clear zone will appear around the disk where the growth has been inhibited. The size of this zone of inhibition depends on the sensitivity of the bacteria to the specific product.and the product’s ability to diffuse through the agar.

Accugen provides cosmetic testing lab services as well as personal care testing lab services.

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Last Updated On: 12-07-10
50 W. 75th Street - Willowbrook, IL 60527 -[]- Phone: 630-789-8105 -[]- Fax: 630-789-8104